C# | Array.FindLast() Method
Last Updated :
17 Dec, 2021
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This method is used to search for an element that matches the conditions defined by the specified predicate and returns the last occurrence within the entire Array.
Syntax:
) Method :
Example 1:
CSHARP
CSHARP
public static T FindLast<T> (T[] array, Predicate<T> match);Parameters:
array: It is the one-dimensional, zero-based array to search. match: It is the predicate that defines the conditions of the element to search for.Return Value: This method returns the last element that matches the conditions defined by the specified predicate if it is found otherwise returns the default value for type T. Exception: This method throws ArgumentNullException if the array is null or match is null. Below programs illustrate the use of Array.FindLast(T[], Predicate
// C# program to demonstrate
// Array.FindLast(T[], Predicate<T>)
// Method
using System;
using System.Collections.Generic;
public class GFG {
// Main Method
public static void Main()
{
try {
// Creating and initializing
// new the String
String[] myArr = {"Sun", "Son", "Tue", "Thu"};
// Display the values of the myArr.
Console.WriteLine("Initial Array:");
// calling the PrintIndexAndValues()
// method to print
PrintIndexAndValues(myArr);
// getting a last element with required
// condition using method FindLast()
string value = Array.FindLast(myArr,
element => element.StartsWith("S",
StringComparison.Ordinal));
// Display the value of
// the found element.
Console.Write("Last occurrence: ");
// printing the string
// following the condition
Console.Write("{0}", value);
}
catch (ArgumentNullException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining the method
// PrintIndexAndValues
public static void PrintIndexAndValues(String[] myArr)
{
for (int i = 0; i < myArr.Length; i++) {
Console.WriteLine("{0}", myArr[i]);
}
Console.WriteLine();
}
}
Output:
Example 2:
Initial Array: Sun Son Tue Thu Last occurrence: Son
// C# program to demonstrate
// Array.FindLast(T[], Predicate<T>)
// Method
using System;
using System.Collections.Generic;
public class GFG {
// Main Method
public static void Main()
{
try {
// Creating and initializing
// new Array String with null
String[] myArr = null;
// getting a last element with required
// condition using method FindLast()
string value = Array.FindLast(myArr,
element => element.StartsWith("S",
StringComparison.Ordinal));
// Display the value of
// the found element.
Console.Write("Last occurrence: ");
// printing the string
// following the condition
Console.Write("{0}", value);
}
catch (ArgumentNullException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining the method
// PrintIndexAndValues
public static void PrintIndexAndValues(String[] myArr)
{
for (int i = 0; i < myArr.Length; i++) {
Console.WriteLine("{0}", myArr[i]);
}
Console.WriteLine();
}
}
Output:
Reference:
Exception Thrown: System.ArgumentNullException
